Igloo

Igloos are structures that will generate in all snowy biomes except for ice spikes. The interior of an igloo is carpeted and will always contain a bed, furnace, crafting table, and, to light up the interior, a redstone torch.

Half of igloos will have a basement research station, accessed by a trapdoor underneath the carpet. The basement will contain a brewing stand, a cauldron, a flower pot containing a cactus, and a loot chest. The cauldron will be partially filled with water, and the brewing stand will always contain a splash potion of weakness.

The basement will also contain a villager and a zombie villager, in two separate cells. The zombie villager can be cured using the splash potion of weakness and a golden apple, which will always show up in the loot chest.

The loot chest can contain a variety of different items aside from a golden apple, which is always present. The most common items are coal, apples, wheat, gold nuggets, and rotten flesh. A rarer item is a stone axe, and the rarest item of all is an emerald.

The basement will be mainly made out of stone bricks, and some of them may be infested stone bricks. Infested stone bricks, when broken, will release a single silverfish. Attacking the silverfish will cause more silverfish to emerge from other nearby infested blocks.